How to make Facebook stop sending me alerts on my iPhone at night?

I shouldn't have to turn off my phone at night because my friends update Facebook all through the night and once school starts, my phone has to be on at night, because it is my only alarm clock… But how am I supposed to get rested for school when my phone buzzes all through the night. I tried turning the notifications off but through the iPhone settings but the damn thing still goes off at night. I need sleep and I will be PISSED if I have to delete Facebook. Please, someone tell me how to make Facebook stop buzzing at night.

You go to settings and then click notifications and there should be a tab for facebook turn it off.

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